Campanula plant named ‘PKM06’

ABSTRACT

A new and distinct cultivar of Campanula plant named ‘PKM06’, characterized by its compact plant habit; globular plant form; vigorous growth habit; double/filled light violet-blue flowers and small leaves.

Latin name of genus and species of the plant claimed: Campanula hybrid.

Variety denomination: ‘PKM06’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar ofCampanula hybrid plant, and hereinafter referred to by the name ‘PKM06’.

The new Campanula, ‘PKM06’, is a product of a planned breeding programconducted by the inventor, Christian Hald Madsen, in Søhus, Denmark. Thenew Campanula originated from a planned cross between two Campanulahybrids; the female parent being an unnamed, proprietary Campanulavariety (unpatented) and the male parent being an unnamed, proprietaryCampanula variety (unpatented). The initial crossing was performed inApril 2014 by the Inventor in Søhus, Denmark, followed by furthertesting after vegetative propagation since then. The inventor selected‘PKM06’ on the basis of blue double flowers and compact growth habit.

Asexual reproduction of the new Campanula cultivar by terminal cuttingsin Søhus, Denmark has demonstrated that the combination ofcharacteristics as herein disclosed for the new cultivar are firmlyfixed and retained through successive generations of asexualreproduction. The new cultivar reproduces true-to-type.

SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined tobe the unique characteristics of ‘PKM06’. These characteristics incombination distinguish ‘PKM06’ as a new and distinct cultivar:

-   -   1. Upright plant habit with stiff stems.    -   2. Bushy globular plant form.    -   3. Vigorous growth habit, but still needing less chemical growth        retardation.    -   4. Double light violet-blue flowers.

Plants of the cultivar ‘PKM06’ can be compared to the unpatentedcultivar Campanula x haydlodgensis ‘Blue Wonder’ and ‘PKM07’ (U.S. Plantpatent application Ser. No. 15/330,522). In side-by-side comparisonsconducted by the inventor in Søhus, Denmark, plants of the instantcultivar ‘PKM06’ and plants of the cultivars ‘Blue Wonder’ and ‘PKM07’differ in the following characteristics:

-   -   1. Plants of ‘PKM06’ have larger flowers than ‘Blue Wonder’.    -   2. Plants of ‘PKM06’ have larger leaves than ‘Blue Wonder’.    -   3. Plants of ‘PKM06’ have a more upright plant habit than ‘Blue        Wonder’.    -   4. Plants of ‘PKM06’ have lighter colored flowers than ‘PKM07’.    -   5. Plants of ‘PKM06’ are less compact growing than ‘PKM07’.

Data on plants of the parent varieties are no longer available forcomparison with plants of the new cultivar Campanula ‘PKM06’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the overall appearanceof the new Campanula ‘PKM06’, showing the colors as true as it isreasonably possible to obtain in colored reproductions of this type.Colors in the photographs may differ slightly from the color valuescited in the detailed botanical description, which more accuratelydescribe the actual colors of ‘PKM06’.

FIG. 1 comprises a side perspective view of a typical flowering plant ofPKM06 grown in a 10.5 cm pot.

FIG. 2 comprises a close-up view of inflorescence of PKM06.

FIG. 3 comprises a close-up view of flowers of PKM06.

DETAILED BOTANICAL DESCRIPTION

The new Campanula ‘PKM06’ has not been observed under all possibleenvironmental conditions. The phenotype of the new cultivar may varywith variations in environment such as growth regulator treatment,temperature, light intensity, day length, and fertility level withoutany variance in genotype.

The aforementioned photographs, together with the followingobservations, measurements and values describe plants of the newCampanula ‘PKM06’ as grown under greenhouse conditions.

The age of the ‘PKM06’ plants described is 3 months after propagation.Color references are made to The Royal Horticultural Society ColourChart (R.H.S.), 5^(th) edition, except where general colors of ordinarysignificance are used.

-   Classification:    -   -   Botanical.—Campanula interspecific hybrid.-   Parentage:    -   -   Female or seed parent.—Campanula unpatented proprietary            selection.        -   Male or pollen parent.—Campanula unpatented proprietary            selection.-   Propagation:    -   -   Type cutting.—Terminal vegetative cuttings.        -   Time to initiate roots.—About 10 to 14 days at 18 to 21° C.            in tunnels in a greenhouse.        -   Root description.—Fine, well branched.-   Plant description:    -   -   Form.—Upright plant habit. Double to filled wide campanulate            flowers in panicles. Freely branching with lateral branches            forming at every node.        -   Crop time.—After rooting, about 12 weeks are required to            produce finished flowering plants in 10.5 cm pots.        -   Plant height (from soil level to top of plant plane).—About            16 cm. Depending on growth conditions.        -   Plant width.—About 25 cm. Depending on growth conditions.        -   Stem.—Color: green, RHS 138B. Form: Round, with recurrent            leaf base.        -   Vigor.—Vigorous growth rate.        -   Fruit/seed production.—None observed.-   Foliage description:    -   -   Basal leaf shape.—Single, dentate, cordiform, palmate            venation.        -   Leaf shape (upper part).—Ovate.        -   Leaf blade length.—Up to 3 cm. Longest in the basal part of            the plant.        -   Leaf blade width.—Up to 3 cm. Widest in the basal part of            the plant.        -   Petiole length.—Up to 4 cm. Longest in the basal part of the            plant.        -   Apex.—Obtuse.        -   Base.—Truncate to slightly cordate.        -   Margin.—Serrate; depth of indentation 2-3 mm.        -   Texture.—Glabrous, stiff.        -   Glossiness.—None.        -   Pubescence.—None.        -   Color.—Upper Surface, RHS N137A, Green. Lower Surface, RHS            138B (Green).        -   Venation color.—Similar or lighter green than leaf blade,            but areas too small to determine R.H.S. values.        -   Leaf blade rugosity.—No rugosity between leaf veins.-   Inflorescence description:    -   -   Flower arrangement and shape.—Single, upright, double to            filled flowers in panicles with many flowers at lateral            branches, flowers with star shaped sepals. Overall            expression broadly campanulate; with some individual whorls            more campanulate.        -   Natural flowering season.—Continuous throughout spring and            summer. Season can be extended through long day treatments,            no vernalization needed.        -   Flower longevity.—Individual flowers up to three weeks.            Flowers persistent.        -   Inflorescence size.—Length: up to 17 cm.        -   Flowers.—Length: About 1.5 cm. Diameter: up to 3 cm. Layers            of corollas (number of whorls): 3-5.        -   Corolla.—Length of tube: up to 10 mm. Length of lobe: up to            10 mm. Width of lobe: 10 mm. Tip of lobe: acute and twisted.            Texture: Glabrous; no pubescence.        -   Corolla color.—Upper and Lower surfaces, RHS between 91A and            92B, violet-blue.        -   Sepals.—Arrangement: Free and sessile. Position: Changes            with bud and flower development; sepals are full size early            in corolla development, appearing stellate. Quantity per            flower: 5. Length: 8 mm. Width: 1-2 mm. Overall shape:            Triangular Tip: Acute. Margin: Entire. Color (mature and            immature): Upper and lower surfaces: Green (areas too small            to give R.H.S. values; nearly as leaf blade RHS 138B).            Pedicel: Length: up to 3 cm. Diameter: up to 2 mm. Color:            light green.-   Reproductive organs:    -   -   Gynoecium.—Pistil and Stigma: Shape: often malformed. Color:            White green tip before opening.        -   Pollen.—Amount: None to very little. Color: When present,            yellow (amount too small to determine R.H.S. value).

I claim:
 1. A new and distinct cultivar of Campanula plant named‘PKM06’, as illustrated and described herein.